Whoops...saw this sale when it was announced and forgot to post about it here...
As for the amount, actually I'd say it's pretty good! A liberty horsehide A-2 at $150 off (15% of £770 = £115.5 = $150.15 at today's exchange rate)? That's nothing to sneeze at. And I'll echo Dibley's point that, since they don't have inventory, they really can't afford to sell things at much more of a discount than that. Otherwise they're working for free, possibly losing money on the deal.